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Tech riderRev. 20 Sept 2026

go-mutesting

Ch 116.2of 25 Mutation Testing Tools
  1. 1Runs onLinux
  2. 2CostsNot stated by the maker
  3. 3Supported languagesGo
  4. 4Test frameworksGo package tests
  5. 5Surviving mutant reportsYes
  6. 6Mutation operatorsBranch: case, if, else; expression: comparison, remove; statement: remove; Cosmos SDK: arithmetic, comparison
5 lines stated Written from the maker's own pages: github.com
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Overview

go-mutesting is ranked #11 of 25 in mutation testing tools on Specifiction. It runs on Linux.

Compared on mutation testing tools

Supported languages
Gogithub.com
Test frameworks
Go package testsgithub.com
Surviving mutant reports
Yesgithub.com
Mutation operators
Branch: case, if, else; expression: comparison, remove; statement: remove; Cosmos SDK: arithmetic, comparisongithub.com

Facts

Purpose
go-mutesting is a framework for mutation testing Go source code to find code not covered by tests.github.com · 4 Oct 2026
Mutation score
It reports a mutation score based on how many generated mutations are killed by the test suite.github.com · 4 Oct 2026
Targets
Targets can be Go source files, directories, or packages, including recursive `...` patterns; `_test` files are excluded.github.com · 4 Oct 2026
Execution
By default, it replaces the original file with a mutation, runs that package’s tests, and reports whether the mutation was killed.github.com · 4 Oct 2026
Custom execution
Users can supply an external exec command to test mutations, with environment variables describing each mutation and exit codes indicating killed, alive, skipped, or unknown outcomes.github.com · 4 Oct 2026
Mutators
Built-in mutators cover branches, comparisons, boolean expressions, statement removal, and Cosmos SDK arithmetic and comparisons.github.com · 4 Oct 2026
Extensibility
Custom mutators can be implemented through the Mutator interface and registered for use by the binary.github.com · 4 Oct 2026
False positives
A checksum blacklist can ignore false positive mutations, but the README says the feature is poorly implemented because source changes alter checksums.github.com · 4 Oct 2026
Integration
The tool can run Go package tests by default and supports external test commands through `--exec`.github.com · 4 Oct 2026
License
The repository identifies its license as MIT.github.com · 4 Oct 2026
Support
The README invites users to make feature requests and report bugs or problems.github.com · 4 Oct 2026
Intended use
The README describes go-mutesting as an addition to automatic test suites and says it can help compare automatically generated and manually written test suites.github.com · 4 Oct 2026

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Where it ranks on Specifiction

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Sources